A primate city is the largest city within a region or nation that dominates not only in size, but also with regards to influence. It often serves as the political and financial hub of a country.
Mark Jefferson, a renowned geographer, was the first person to put forward the concept of primate cities. According to his definition, a primate city has to be twice as large in size as the next biggest city. It must also be twice as important, socially and economically. Moreover, a primate city needs to be on top in most aspects, including politics, universities, media and culture.